Sand-pump



Patehted Sept. 6, I898. V. HANSON. SAND PUMP.

(Application (11nd May 17, 1897.)

(No Mo el) NITED ST TES VICTOR HANSON, or RICHMOND, VIRGINIA'ASSIGNOR or ONE-HALF To JAMES e. WHITLOCK, orIIANovER COUNTY, VIRGINIA.

SAND- SPECIFICATION forming part of Letters Patent No. 610,325, dated September 6, 1898.

Application filed May 1 7 1 8 97.

To a whom-it may concern:

Be it known that I, VICTOR HANSON, acitizen of the United States of America, residing at Richmond, in the county of Henrico and State of Virginia, have invented certain new and useful Improvements in Sand-Pumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to sand-pumps, and

v has for its object the perfection of direct-acting force-pumps, so as to enable them to be used for dredging purposes; and it consists in the location of the valves, so as to prevent clogging, in the location of the pump-cylinders relatively to the direction of flow of the spoils and to the aforesaid valves, in a discharge, so as to prevent pulsation, and a novel method of lubricating the plungers, and in the construction, combination, and arrangement of parts hereinafter described, and particularly pointed out in the claims.

Referring to the drawings, in which like letters of reference indicate corresponding parts throughout both views, Figure l is a perspective view, partly in section, showing my improved pump; and Fig.2 is a perspective view of the shoe or foot of the suction-pipe.

A A are the pump-cylindersg'B B, the pistons, which I make hollow and secure at their, closed ends the piston-rods O C. These pistons are provided with extensions or wings D on either side at their open ends and have in said extensions or wings notches cl, that fit and slide over guides E, fastened to the sides of the cylinder. From the end of the pumpcylinder A to the main pump-chamber Gis a short connection F, that is tapped at a suitable point for the admission of an oil-duct f for lubricatingthe pump-pistons B.

' The suction-pipe K, parallel to the branches II of the main pump-chamber, rises to a common feed-chamber I at right angles to said suction-pipe, which chamber has at either end valves i where the vertical branch H of the main pump-chamber connects with it.

Serial Nor 636,971: (No model.)

I i This location of thevalves at the junction of the two chambers is very advantageous, as it prevents any possibility of clogging, any accumulation of silt readily falling down into the arm H of the main pump-chamber. At the discharge end of v the main pump= chamber, where it connects with the union discharge L, I provide valves g, similar in lo cation and construction to the valves '5 and for a similar reason.

, From the eXit end of the main pump-cham ber G are vertical arms L of the dischargepipe, which connect and join the outflow pipe M, v l

The operation of the pump is as follows: Before starting or just after starting, when the main pump-chamber has been once filled,

to chamber F by turning the valve f in the pipe leading from the cups f This oil rises to the surface of" the water, and as the main pump-chamber G is never empty and the oil is not forced out of the pipe F it always remains in contact with the pistons,floating on the residuary water, and keeps said pistons lubricated. Suction on the upstroke of the piston draws water through the suction-pipe K into the chamber I past the valves 2' into the main chamberG and'the pump-cylinders A, first into one and then into the other, the pistons working alternately. When on the downstroke, the" pressure in chamber G and branch H closesvalves i and opens valves g to the common discharge pipe M. Inasmuch as the residuary water ora portion thereof is replaced by a body of oil, the latter is continuously caused to move with the pumpbetween the said plungers and the water a lubricating-diaphragm that is impermeable by water and by silt or sand entrained by such water, so that the cylinders are not only kept well lubricated, but are shielded against Wear. I thus obviate in a very simple manner one of the great difficulties met with in dredging-pumps. By arranging the pumpcylinders perpendicular to the line of flow of the spoils intermediate of the inlet and discharge valves the full suction and forcing power of the pumps is exerted upon the spoils in a more rational manner than would be the a quantity of oil is let in through the oil-duct f plungers during their reciprocations,forming case otherwise and their flow from the sue tion to the discharge pipe expedited and an accumulation of sand in the drops avoided. The accumulation and packing of sand in the drop-pipes H and L are further prevented by arranging the inlet and discharge valves at the points of junction between the main pumping-chamber and the receiving-chamber and discharge-pipes L, as itis obvious that if said valves were located at the lower end of the drops sand would be liable to accumg;

late and soon render the pump inoperative, and this has been fully proven by practical experiments. It will also be observed that the line of piping in which the pump-cylinders are interposed is of substantially the same cross-sectional area, so that there is no retardation in the flow of the spoils, as is the case when the main pump chamber is of greater area than the suction and discharge pipes. A perfect closure of the valves is insured, because any accumulation must fall to the bottom of the vertical sections II and L, thus effectually preventing any packing in front of or under the clacks of valves c'and g. The main discharge t'. e., the pipes L and L, uniting and emptying into a common pipe M-prevents the sand or silt from having a chance to settle, as when one pumpchamber is taking in water the other is discharging, so that there will be continuous motion in the exit-pipe M.

The shoe or sucker at the end of the suction-pipe K, Fig. 2, is cylindrical, having cutaway portions to allow entrance of the sludge and is provided at its upper end with a screen P to prevent large stones from passing through the pump. Over the sieve is the usual closed chamber V, communicating with the suction-pipe.

The cylinder N has provided in its sides holes Q, that are adapted to register with similar holes q in an adjustable collar B, said collar having cut-away portions 0, similar to those in the cylinder N.

The collar R is also provided with a suitable slot 0", through which bolts S, fastened to the cylinder N, project, said bolts having nuts on their ends to fasten the sliding collar in adjusted position. The elongation of the shoe by sliding the collar so as to have the holes Q and q register decreases the amount of sand fed to the pump.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is 1. In a pump, the combination with the suction and discharge pipes, an inverted-T- shaped main chamber on a lower levelthan said suction-pipe and on a higher level than the discharge-pipe,said suction and discharge pipes connected with the horizontal member of the chamber at diametrically opposite ends respectively,and suction and discharge valves at the points of connection between said horizontal member of the chamber and the suction and discharge pipes respectively; of a pump-cylinder connected with the vertical member of the pump-chamber, for the purpose set forth.

2. In a pump, the combination with the suction and discharge pipes, an inverted-T- shaped main chamber on a lower level than said suction-pipe and on a higher level than the discharge-pipe, said suction and discharge pipes connected with the horizontal member of the chamber at diametrically opposite ends respectively,and suction and discharge valves at the points of connection between said horizontal member of the chamber and the suction and discharge pipes respectively; of a pump-cylinder connected with the vertical member of the pump-chamber and means for supplying lubricant to said member, for the purpose set forth.

3. A shoe for suction-pipes comprising a chamber at one end of'said pipe, a strainer across said chamber, a cylindrical element connected therewith and provided with perforations and cut-away portions, and a sleeve similar to said cylinder provided with like perforations and cut-away portions and adapted to be adjusted along said cylinder, for the purpose set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

VICTOR HANSON.

W'itnesses:

G. A. HANSON, EARLE ALLEN. 

